[wrenchnride247]

Shims are a step in the right direction, but they will screw-up your static compression ratio per cylinder if they are not all the same per chamber. The chamber volumes must be the same(or very close)for the motor to run good, same goes for shims under the cylinder. If you put shims under the cylinder, or copper gaskets in the head chamber they must be the same for ALL cylinders. Example, in one chamber you have a .030 gasket and a .060 in the chamber next to it to get the head to sit level on the cylinders, you will have a different volume in each cylinder(poor running motor). The only way to correct the depth is to remachine the chambers so they are the same. Then you can use gaskets, and or cylinder spacers, to get a good compression ratio. Sorry .